The Importance of Dimorphism and Threshold Traits Regardless of the species or type of dimorphism in question, it is clear that numerous traits are influenced by multiple genes. Many ...

Head down deep enough into the ocean and you might just find the lord of the underworld – except it turns out he’s a bit more ...

We know from animals alive today that individual species can look very different to each other. The way some animals look also varies depending on their observed sex. This phenomenon is known as ...

This story appears in the January 2017 issue of National Geographic magazine. The difference in appearance between a species’ males and females is called sexual dimorphism. The term implies that ...

Males and females of the species look the same, meaning there isn’t sexual dimorphism, or sexes of the same species appearing different physically. The fish are less than 3 inches long, researchers ...

This butterfly, whose only known host plant is the pineland croton, reaches adult sizes of 2.75 to 3 inches and displays sexual dimorphism, which means that ... include habitat destruction, nonnative ...

Some Corydalis species exhibit leaf colors that closely ... In this study, the researchers leveraged leaf-color dimorphism (where camouflaged and green morphs coexist) and population-level ...